Coin-controlled weighing scale



` H. HEM

COIN CONTROLLED WEIGHING SCALE Filed June 27, 1924 l Sheets-Sheet 1 m., a ma,

H. O. HEMI COIN CONTROLLED WEllHING SCALE Filed June 27, 1924 4 Sheecs--Sheei'I 2 @et 2, W28,

Hyw@ H. O. HEM

COIN CONTROLLED WEIGHING SCALE Filed June 27, 1924 4 Sheets-Sheet 3 W H. U. HEM Y COIN CONTROLLED WEIGHING SCALE Filed June 27, 1924 4 Sheets-Sheet 4 llt limiti u ma Application filed June it?, 19%.

',llhis invention relates to weighing: scales, and more particularly to scales in which the loadfcounterhalancing; and indicating mechanisms are normally locked against weighing` movement but may be released. by pressing a button or other manual operation.

Une ot the principal objects ot' my invention is to provide a weighing scale oi this type in which the releasing mechanism is opeialole only upon the insertion ot a coin which acts as a hey tor-ming a part oit the releasing means.

ltnother important object ot the invention is to provide means whereby the weighing mechanism is unlocked only alter the discharge ot the coin has progressed to a point where the same `coin cannot be used tor ohtaining a subsequent weighing.

Another object ot the invention is the provision oli a coin-controlled weighingscale in which the device tor releasingthe load-counn ter-halaimingl and indicating; mechanisms .is simple, and sturdy and positive in its action.

fl. turth er object ot the invention is the provision of a coin-controlled weighing,V scale of this type so constructed that only one weighing; may he obtained for each coin inserted A `turther object is to provide a coin-controlled locking device which may be applied to person wei ghing scales of 'known construction witl'iout involving' alterations in the weighingl mechanism ott the scale.

Another object is to so construct the coincontrolled locking mechanism that it can be assembled us a unit and can be incorporated in the scale or removed therefrom as a unit.

lrnd still another object is the provision oli a coin-controlled locking' device which does not atleet the accuracy oi the scalen @ther objects and advantages will be ap parent li'roin the tollowing specification, in which reterence is had to the accompanying drawings illustrating; a preferred en'ibodi ment ot my invention and wherein similar reiterence numerals designate similar parts throughout the several views.

lin the drawingL Figure lt is a liront elevational. view of a weighing` scale of the person weigher type emhodyinggl my invention;

Figure lli is an enlarged fragmentary vertiealvsectional view showing some ot the mechanism ot the locking device and apart lilcal Flo. iftth ot the weighing;l mechanism in loelred posiu tion;

F lgure lll is a similar view showing the scale mechanism in unlocked position;

F ieg-ure FV is a sectional plan view showing' the coin-controlled lookin@r device;

Figure V is a vertical sectional view taken substantially on the line l7-`l7 of Figure FV, showing a coin in the coin chute prior to the manual operation of the device;

Figure Fl is a similar view showing` the parts in the position assumed near the end et a manual operation;

F igure Vil is u vertical sectional lview taken substantially on the line Fllwli/Tllt of Figure lV;

F igureflllli is a vertical sectional view talren substantially on the line HVllll-l7lilll ot Figure ll g Figure lll is a fragmentary 'front elevational view oit a part `ot the scale housing containing` the coin receptacle, some oli the parte inside the housingr beingr shown in dot-- ted lines;

Figure is a sectional plan view taken substantially on the line KMK of Figure lli;

Figure Fili is a sectional plan view taken substantially on the line Fili-H ot' Figure lll;

Figure XH is an enlarged isometric view oil a Sector and arms fixed upon a rock sha-itt and torming; parts ci the device oi? my inventi on Figure lllfllll is an enlarged fragilientary elevational view showing` the coin-controlled mechanism in locking position; and

Figure lllF' is a sin'iilar view showing the coin-controlled mechanism in releasing position. i

Referring to the drawings in detaih the base 1 ot the .scale supports and encloses the platform levers (not shown) which in turn support the platiiorn'i Q. A hollow column 3 is si'ipported upon the rear end ot the base and extends upwardlv therefrom and upon the upper extremity ot the column is mounted a traine l which carries the coin-controlled locking; mechanism. tduperilnposed upon. the frame Il a substantially watclncaseshaped housing' 5 which supports and encloscs the loud-counterbalancing mechanisiu oi the scale.

The

load-counterbalancing mechanism lll@ lillii shown is substantially of the automatic pendulum type described in Uv. S. Patent No.

- 1,203,611, to Hapgood, dated November 7,

1916, and includes a pair of oppositely swinging pendulums 7 suitably connected by means of a steelyard rod 3 to the platform lever mechanism and adapted to swing outwardly and upwardly to counterbalance loads on the scale platform. The pendulum mechanism is suitably connected by means of a rack and pinion (not shown) to an indicator hand 10 which indicates the load upon a chart mounted within the housing 5 and visible through a glazed window in the face thereof.

F ixedly secured to the frame 4 is a bracket V12 having a depending arm to which a lever 13 is pivoted as at 14. The lever 13 is connected by means of a pin 15 to a link 16 inter" posed between sections of the steelyard rod 3, so that the lever 13 is swung on its pivot 14 as the steelyard rod 3 moves downwardly.

lWhen there is no load on the scale platform and the indicator hand 10 is in zero position, the lever 13 is in the position shown in Figure XIII.

Fixed to one end of the lever 13 is a serrated or notched bar 17 the teethv of which are normally in mash with the teeth of a pair of toothed fingers or pawls 19 and 20. The lingers 19 and 2O are pivoted on a pintle 21 carried by a bracket 22 which is tixedly secured to the frame 4 by means of screws 23. With theteeth of the'ngers 19 and 2O engaged with the teeth of the notched bar 17 a load upon the platform of the scale will not affect the load-counterbalancing and indicating mechanism, because the lever 13 being locked against movement, the steelyard rod 8 cannot be pulled downwardly by the load. Each of the fingers 19 and 20 has a pair of ears 25 and 26. The ears 25 on the linger 19 loosely straddle a depending part of a lever 27, while the ears 26 on the finger 2() loosely straddle a depending part of the lever 23. The levers 27 and 28 are also pivoted upon the pintle 21 carried by the bracket 22, so that the fingers 19 and 20 and the levers 27 and 2S may swing together about the pintle 21. If the levers 27 and 23 are moved upwardly, the dependingr portions thereof will engage with one of the ears of each pair 25 and 26 to move the teeth of the fingers 19 and 20 out of mesh with the bar 17, thereby releasing the lever 13 so that a load on the platform may act through the steelyard rod 3 upon the load-counterbalancing and indicating mechanisms of the scale.

Projecting inwardly from the rear wall of the frame 4 is a vboss 33, and slidably positioned in the frame 4 and boss 33 is a forwardly eXtending plunger 34 having a reduced portion 35 surrounded by an expansive spring o 36 which is retained in a socket in the boss 33 and serves to resiliently hold the plunger 34 in its outermost position. The plunger 34 has a rack portion 33 which is constantly in mesh with the toothed segment 39 pinned or otherwise fixedly secured to a rock shaft 40 journaled in bosses 41 which are integral with and project inwardly from the frame 4.

Fixedly secured on the rock shaft 4t) adjacent. to the toothed segment 39 is a member -1-2 having outwardly projecting arms 43 and 44.V Then the toothed segment 39 is rotated by an inward movement of the plunger 34 the arm 43 engages the extremity of the lever 27, andthe depending portion o1 the lever engaging one of the ears 25 swings the linger 19 about the pintle 21 and disengages the teeth of the finger from the teeth of the bar 17. rllhis movement will not, however, release the lever 13 while the teeth of the linger 20 remain in mesh with the teeth of the bar 17.

The frame 4 is provided with a coin chute 47 which extends downwardly from its opening in the front of the frame so that a coin inserted in the chute will roll to the position shown in Figure V. A laterally turned linger on the arm 44 extends into the coin chute through an arcuate slot 50 in one of the walls of the chute and as thc arm 44 is swung about the axis of the rock shaft 10 by pressure on the plunger 34 the linger 45 moves through the chute from the position shown in Figure V to the position shown in Figure VI. If a coin has been inserted in the chute prior to such movement of the linger 45 the coin will be carried along the chute to the position shown in Figure VI and will thus be brought into engagement with a pad 52 constituting a part of the lever 23. Engagement of the coin with the pad 52 swings the lever about the pintle 21, and the depending portion of the lever engaging one of the ears 26 on the linger 20 swings the finger about the pint/le 21 and thereby disengages the teeth of the Vfinger from the teeth of the bar 17. The parts are so adjusted and arranged that when a coin has been placed vin the coin chute the lever 23 is moved by engagement of the coin with the pad 52 before the arm 43 engages the lever 27. The lever 27 is not, in fach/moved upwardly bythe arm 43 until after the coin reaches the position shown in Figure IV, so that a. release of the lever 13 is effected after the coin is practically over the rise 51 in the bottom of the coin chute and cannot roll back into its original position in the chute upon release of the. plunger 34 but must fall into the discharging part 53 of the chute. This feature of construction makes it impossible to obtain more than one weighingfor each coin inserted. i

Villien the coin is discharged through the portion 53 of the coin chuteit falls through a substantially vertical tube or channel 55 into a coin receptacle 57 located within the lower part of the column 3. The function of the tube 55 is merely to guide the coin into the ino till

tibi

Lanarte part ot the column below which there are no projections or other obstructions upon which it may lodge, and in order to insure the coins dropping into the receptacle, suitable guide vanos 56 are cast upon the inner walls of the column immediately above the coin receptacle. rlllhe coin receptacle is supported upon suitable brackets all cast or otherwise iernied inside the colunm. l

ln order to prevent re-engagement ot the teeth ol" the lingers 1l) and 2() with the teeth ol" the 'toothed bar 17 betere the scale mechanism has had time to come to rest in weig hinnposit-ion, l have connected a dash pot 5l) to the lever Q8, so that when the lever Q8 has been raised or swui'ngl about the pintle Ell by engagement et' a coin with the pad 52 the dash pot plunger will be raised and the teeth et the linger 20 will be held out el engagement with the teeth ot the bar 17 until the plunger slowly sinls to a position adjacent the bottom olf the dash pot. rlhe large dash pot 58 shown in Figures ll and lil. as connected to the lever 13 serves to damp the vibratory movement of the scale and bring it quickly t0 rest.

lt will be seen upon examination ot the drawing, particularly Figures lll and Kill, that the teeth on the linger 19 engage the teeth oi the bar 17 that are near the top, so that "when the lever 13 is pulled downmrrdly by a load on the platform the teeth ott the linger 19 cannot re-engage the teeth ot the bar 17 until the load is removed, l is soon, however, as

' the load is removed, the teeth ot the linger 19 and the teeth oil the bar l't reengage, even though the dash pot plunger has not h ad time to sink.

The teeth oi' the bar 13 are turned downwardly, while the teeth on the lingers 19 and 2O are turned upwardly, and the ears 25 and 26 of each pair are spaced su'lliciently to per mit the lingers to swing back and allow their teeth to ride over the teeth et the bar 17 when the lever moves upwardly after the load has been removed trom the platform, so that the scale can return to zero position even though the locking mechanism has reassumed the normal position in which it is shown in llig ure Kill.

Access to the coin receptacle obtained by means olf a locked door o() in thetront olf the column 3, the door being hinged, as is shown at 61, so that it may when unlocked be swung open. llhen the door is open the coin recep tacle may be lifted out ot the colun'in and its contents emptied. any suitable lock may be employed tor the door o0.

lin order to prevent manipulation of the lever 28 by the insertion oi a thin bar olf metal in the coin chute, a threaded member (l5 is lined in the 'frame l with one of its ends ei;- tendinginto the coin chute in iti-ont oi the pad 52. it. coin may pass without interference beneath the member but a straight bar, it inserted in the coin chute, will bcobstructed by the member 65, and a bent in`strument passed beneath the member into engagement with the pad 52 will interfere with movement oi the linger lo and thus prevent the arms d3 and All irom swinging about the axis oi the rock shait lll rl-h-e embodiment ot my invention herein shown and described is to be regarded as illustrative only, and it is to be understood that the invention is susceptible to variation, modiiication and change within the spirit and scope oit the subjoined claims.

Having' described my invention, l claim 1. ln a weiglaring;` scale, in combination, weighing mechanism, and locking mechanism therefor, said locking` mechanism having a member ier preventiire,` weighing movement ot said weighing mechanism, releasable means tor said member coiiunising` means adapted to be engaged by a coin or the like, and manually oi rrable means engageable with said coin ivl'iereby said coin iorms a necessary element ci said releasing mechanism, said locking' mecl'ianisni having; an additional member for preventing movement of said weighing` mechanism and releasing means Alier said additional member, said releasing means being operated by said manne ally operable means subsequently to engagement ot said coin with said coin engaged means.

2. ln a weinhinp,l scale, in combination, weighing mechanism, a pair oli lookin in mns therefor, coin-controlled manually operable means tor releasingn one oi said locking means, and manually operable means tor releasing; the other ci said locking; means.

3. ln a weighing scale, in combination, weighing mechanism, a pair ot locking means therefor, a common manually oper able means tor releasing both of said locking means, and means whereby a coin may be interposed between an clement of said manually operable means and an element of one oit said locking means to form an operative connection therebetween.

Ll. ln a weighing scale, in combination, weighing mechanism, a pair et locking means therefor, a common manually operable means iter releasing both olf said locking means, and means whereby a coin may be interposed between an element el' said manually operable means and an element ot one of said locking means to 'form an operative connection therebetween, the other et said locking; means be in@1 operated by said manually operable means without the imposition ot a coin.

5. ln a weighing scale, in combination, weiglimp,` mechanism, a pair ot loclrin means therefor, a common manually operable means tor releasing' both of said locking means, and means whereby a coin may be interposed bem tween an element of said manually operable means and an element oi one of said locking till means to form an operative connection therebetween, the other of said locking means being operated by said manually operable means without the imposition of a coin, the parts being so constructed and arranged that the last said locking means is released subsequently to the release of the coin-controlled locking means.

6. In a weighing scale, in combination, weighing mechanism, an element connected to said weighing mechanism and having a series oi' teeth, locking mechanism comprising a pair of members having teet-h engageable with the teeth ot' said element, means for disengag- 'ing said members from said element, the parts being so constructed andarranged that one of said members cannot be re-engaged with said element while said weighing mechanism is in weighing position, and means for retarding re-engagement of the other oi? said members with said element.

7. In a weighing scale, in combination, weighing mechanism, an element connected to said weighing mechanism and having a series of teeth, locking means iter said weiglr ing mechanism including a pair oil members having teeth engageable with the teeth of Said element, manually operable releasing means adapted to act through a coin on one of said members and subsequently to discharge said coin, and means whereby said manually operable releasing means acts upon the other oi' said members subsequently to its action through such coin on the first of said members.

8. In a weighing scale, in combination, weighing mechanism, locking means `for said weighing mechanism, and manually operable releasingr means for said locking mechanism, comprising a push member, means adapted to be rocked by movement of said push member, a coin chute, an extension on said rockable means adapted to move a coin along said coin chute, means extending into said coin chute and adapted to be engaged by said coin, means whereby engagementof said coin with the last said means releases said loclrinfi means, additional locking means ior sai weighing mechanism, and means whereby further movement of said roclmble means releases said additional locking means.

9. ln a weighing scale, in combination, weighing mechanism, including a lever, said lever having a serrated member connected thereto, a pair oi' lingers having teeth to mesh with the teeth of said serrated member and thereby lock said lever against weighing movement, coin-controlled manually operable means for releasing the teeth ol' one olf said fingers 'from the teeth of said member, and manually operable means lor subsequently releasing the teeth of the other of said lingers from the teeth of said member.

l0. ln a nf'eighing scale, in combination, weighing mechanism, dual locking means therefor, and releasing means for said dual locking means, comprising a plunger adapted to be 'l'orced inwardly, means adapted to be rocked by inward movement of said plunger', a coin chute, said rockable means having a part extending into said coin chute and adapted to move a coin therealong, means extending into said coin chute and adapted to be engaged by a coin when moved by said part, means whereby movement ot said coin engaged means releases one element of said dual locking means, and means whereby turther movement of said rockable member el? ects the release of the other element oi said dual locking means.

ll. In a weighing scale, in combination, weighing mechanism, locking mechanism, and releasing mechanism lor said locking mechanism, said releasing mechanism having means whereby it is operative upon insertion of a coin, and means whereby the completion of its operation is retarded until the discharge ot said coin has` reached such a point that the operation of the releasing mechanism cannot be repeated with the same coin` HALVOR O. l-l Eh I. 

